William mcausland



(No Model;) 7

W.1V[0AUSLAND. MANUFACTURE OF OVAL 0R OBLONG SHELLS FOR PLATED WARE,6:0. I

N0. 493,108. Patented Mar. 7, 1893.

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ATTORNEYS.

UNITE STATES PATENT ()FFICE.

WILLIAM MOAUSLAND, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO THE REED &BARTON CORPORATION, OF SAME PLACE.

MANUFACTUREVOF OVAL 0R OBLONG SHELLS FOR PLATED WARE, 8L0.

SPECIFICATION forming part of Letters Patent No. 493,108, dated March 7,1893.

Application filed October 3, 1892- Serial No. 447,746. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM MCAUSLAND, of Taunton, in the county ofBristol and State of Massachusetts, have invented a new and usefulImprovement in the Manufacture of Oval or Oblong Shells for Plated Ware,&c., of which the following is a specification.

My invention relates to the manufacture of oval and oblong bodies'orshells for hollow plated ware, and it consists of an improved method ofmanufacturing oval or oblong shells which is quite inexpensive, andwhereby at the same time a seamless oval or Oblong shell is obtained ashereinafter fully described with reference to the drawings in whichFigure 1 is a side and Fig. 2 a plan view of a round seamless metalshell which is treated by my method to form an oval seamless shell. Fig.3 is a side elevation, and Fig. 4 a transverse section through line05-;1; of the round shell applied to an expanding former of specialconstruction, whereby it is converted into an oval seamless shellwithout destroying or marring its surface ornamentation.

I construct aspecial former whose body part is made of a number oflongitudinal sections A A A whose outer peripheries when assembledcorrespond to the oval or oblong shape desired, and whose inner surfacesform a longitudinal tapering hole extending entirely through the former.Within this tapered hole there fits a tapered central plugB of circularor other cross section,which fits'tightly into the sectional former andwhen driven in expandsit.

To give the oval or oblong shape to the shell shown in Figs. 1 and 2,the two largest sectionsA of the former,which form the prolate ends ofthe ellipse, are first inserted in the round shell and the central plugdriven in between, the result being that the shell is at once elongatedand begins to be drawn into an oval shape. The plug is then driven backand one or more sections inserted, the plug again driven, again removed,and another section inserted, and so on,until the two lateral or oblateside sections A are inserted, when the plug is finally driven to place,fully expandin g the former and permanently convert ing the shell intoan oval or oblong symmetrical shape without disturbing the surfaceornamentation, and without seams, and in an inexpensive and expeditiousmanner.

I am aware that sectional chucks are not broadly new as they have beenmade both round and oval for many years.

I am also aware that expanding formers composed of equal sections havebeen ex-' panded by a central plug to expand a small circle to a largerone, but something more than this is done in my case where a circle isto be expanded into an oval or oblong figure. my case a differentconstruction and mode of operation is employed as follows. The formersections are not of equal size, but those which give shape to theprolate ends of the figure are much larger than those which form thesides, and in the operation of expanding, these prolate sections arefirst inserted without the others, the plug driven in, and a preliminaryexpansion is given to the ends, the plug removed, the next set ofsections inserted, another expanding operation made,

and so on successively the sections are inserted and an expansion madeuntil the desired contour is attained.

I do not confine myself to the use of wood in constructing the former,as metal or other material may be used. Neither do I confine myself toshaping metal shells, as shells of pasteboard, wood fiber, rubber, orany other material which is pliable or ductile may be thus treated.

Having thus described my invention, what I claimas new, and desire tosecure by Letters Patent, is

The method herein described of forming seamless oval or oblong shells ofductile or plastic material, which consists in first making a roundseamless shell, and then expanding it to an oval or oblong shape byintroducing successively sectional former blocks of different size andshape, and expanding these blocks progressively by a tapering plugforced centrally through the same, the larger end sections being firstinserted expanded and retained, and the smaller side sections beingsuccessively addedsubstantially as shown and described.

WILLIAM MOAUSLAND.

Witnesses:

JAMES P HERSEY, E. R. HIoKs.

